The price spread between premium two-channel and 2.1-channel products is not much at all, yet a subwoofer can add a lot of bass presence. With very good 2.1-channel PC speaker systems starting in the $150 range, you really need to define your PC audio goals to understand which product is right for you. Are size and convenience your primary concerns, or can you you can spare the space and love your bass? Whatever you choose, you should try these options out at a local electronics outlet before you commit to a purchase.